Nice sliding setup. I have a similar setup with the one behind me mine actually has to get picked up and moved to different sets of screws. I wasn't able to center it directly behind me because of the door position.

A reconfiguration of the bedroom audio system that adds diffusion to the mix with Alpha 4A 1D panels. Showing the room's front, rear, and left and right side walls.

The sawtooth-hangered angled Alphas at the front left and both rear corners are hung with L-hooks drilled into the rear and side walls. Clearance issues precluded a 45-degree corner straddle, so using high-school trig I calculated hook placement for shallower-angle positioning.

The Alpha on the door is suspended from the protruding screw head on the over-the-door-top scrap-lumber fixture shown in the final two photos.